Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	$ 13.3	$ 17.4	$ 18.1
Estimated future amortization expense of intangible assets year one	9.8
Estimated future amortization expense of intangible assets year two	7.1
Estimated future amortization expense of intangible assets year three	3.5
Estimated future amortization expense of intangible assets year four	2.3
Estimated future amortization expense of intangible assets year five	$ 1.7